Gardaà arrested five people and seized 19 petrol bombs during an investigation into organised criminal activity in Co Kildare.
Detective Gardaà attached to Leixlip Garda station intercepted a car in the Carbury area of the county at about 11.30pm on Monday and, following a search of the vehicle, recovered the improvised explosive devices.
Four men were subsequently arrested and were detained on Tuesday under Section 4 of the Criminal Justice Act, 1984, at a Garda station in Co Kildare.
A man in his late 40s who was armed with a knife and who confronted gardaà at the scene was also arrested. He has since been charged.
Gardaà said investigations were ongoing.